Abstract
We investigate the effect of an electric field applied to two systems; a spherical quantum dot and a cylindrical quantum wire. In the latter system the field is applied perpendicular to the cylinder axis. We are interested on the energy ground state of carriers in the quantum dot and wire using an infinite confining potential well model. We perform a variational calculation for both systems and for low electric fields we find a quadratic shift of the energy levels with the electric field. For strong fields the Stark shift of the energy groundstate increases almost linearly with the electric field. In order to compare the results of both systems, we choose the radii of the sphere and the cylinder to be equal. For same radii the Stark shift of the sphere is smaller than that of the cylinder. (© 2005 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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